SP240V400KA Extreme Duty Whole House Surge Protector, 400kA, Type 1 SPD, 120/240V Split-Phase
$499.00
SP240V400KA is an extreme duty 400kA whole house surge protector designed for 120/240V split-phase electrical systems. This Type 1 surge protective device helps protect homes, commercial buildings, farms, and critical equipment from lightning, utility switching, and other high-energy transient surges. ETL Listed to UL 1449 5th Edition and CSA C22.2 No. 269.1 / 269.2, with additional testing to FCC 47 CFR Part 15: 2024 and ICES-003: 2020. Also as an EM-rated surge protector it helps to protect against EMP, CME, and solar flare-related disturbances.
SP240V400KA — Extreme Duty 400kA Whole House Surge Protector for 120/240V Split-Phase Systems
The SP240V400KA is an extreme duty 400kA whole house surge protector built for customers who want a higher level of surge protection for demanding electrical environments. Designed for 120/240V split-phase electrical systems, this Type 1 Surge Protective Device (SPD) helps protect service panels, branch circuits, and connected equipment from damaging transient surges caused by lightning strikes, utility switching events, large load changes, and other high-energy power disturbances.
With a powerful 400kA surge current rating, the SP240V400KA is positioned as a premium solution for installations where stronger surge protection is desired. Compared to lower-capacity models, this unit offers greater surge handling capability in a larger physical package, making it a strong choice for residential, commercial, agricultural, and other critical power applications where maximum protection matters.
The SP240V400KA is ETL Listed to UL 1449 5th Edition and compliant with CSA C22.2 No. 269.1 / 269.2. It has also been tested to FCC 47 CFR Part 15: 2024 and ICES-003: 2020. For customers seeking broader preparedness against severe electrical events, this model can also be described as an EM-rated surge protector to help protect against EMP, CME, and solar flare-related surge disturbances.
Designed for whole building surge protection at the service entrance or distribution equipment, the SP240V400KA helps reduce the risk of surge damage to appliances, HVAC systems, electronics, smart home devices, pumps, well equipment, shop tools, farm systems, and other valuable electrical loads. Its Type 1 SPD design makes it well suited for applications requiring a robust first line of defense against incoming surge energy.
Electrical Specifications
Nominal System Voltage: 120/240V AC Split-Phase
SPD Type: Type 1
Maximum Surge Current Rating: 400kA
MCOV: 150V / 300V
SCCR: 100kA
Modes of Protection: 6 modes
Enclosure Rating: IP67, NEMA 4X
Flammability Rating: V0
Frequency: 50/60 Hz
Application: Whole house / service entrance surge protection
System Configuration: 120/240V split-phase
Installation Location: Service entrance, main electrical panel, or distribution equipment
Connection Information
The SP240V400KA uses a 1/2 inch straight liquid-tight conduit connector style connection.
Certifications and Compliance
ETL Listed to UL 1449 5th Edition
CSA C22.2 No. 269.1 / 269.2
Tested to FCC 47 CFR Part 15: 2024
Tested to ICES-003: 2020
Key Features
400kA surge current rating
Extreme duty whole house surge protector
Type 1 SPD for 120/240V split-phase systems
MCOV 150V / 300V
100kA SCCR
6 modes of protection
IP67 and NEMA 4X enclosure rating
V0 flammability rating
Helps protect against lightning, utility switching surges, and internal transients
Promoted as an EM-rated surge protector for EMP, CME, and solar flare-related disturbances
Ideal for residential, commercial, agricultural, and critical equipment applications
Applications
The SP240V400KA is well suited for:
Residential whole house surge protection
Service entrance surge protection
Commercial electrical systems
Agricultural and farm electrical systems
Workshops and detached buildings
HVAC and mechanical equipment protection
Critical power and premium protection applications
Product Details
| Weight | 21 oz |
|---|---|
| Dimensions | 7.5 × 3.25 × 2.25 in |
| Application | Commercial, EV Charging Station, Farm, Generator, Home, Irrigation, Marine, RV, Solar, Wind |
| Connection Type | Hardwire |
| Product Dimensions | 7.5"x3.25"x2.25" |
| Product Weight | 21oz |
| Surge Type Category Rating | EMP (E1, E2 and E3 Phase), Lightning, Solar Flare (CME) |
| Service Type | Split Phase |
| SPD Classification | Type 1, Type 2 |
| Surge Current Rating (A) | 400kA |
| Type of Electrical Current | AC |
| Voltage (Vac) | 240 |
| Environmental Rating | Indoor, Outdoor |
Specifications
Review the product details and product description for voltage, surge current rating, connection type, enclosure rating, wiring details, certifications, and other technical information.
For detailed product-specific ratings, refer to the specifications listed on this product page and any available product documentation.
Installation
Installation should be performed by a qualified electrician, licensed contractor, or qualified installer in accordance with the product instructions, applicable electrical codes, and local requirements.
Always disconnect power before installation and verify the product is suitable for the electrical system where it will be installed.
Warranty
Bad Wolf surge protection devices include a 5-year product warranty.
Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.
Please review the full warranty terms for complete details, limitations, registration requirements, and coverage information.
Accessories
Recommended accessories and related products for this item.
FAQ
What is the SP240V400KA mainly used for?
The SP240V400KA is commonly used as a premium high-capacity whole-house surge protector for residential, light commercial, garage, workshop, and small business 120/240V split-phase electrical systems.
Where is the SP240V400KA installed?
The SP240V400KA is typically installed at the main electrical panel, service equipment, or another compatible panel location to help protect connected equipment throughout the electrical system from damaging power surges.
What type of electrical system is this surge protector designed for?
The SP240V400KA is designed for 120/240V split-phase electrical systems commonly used in homes, garages, workshops, small businesses, and light commercial applications.
Can the SP240V400KA be used as a whole-house surge protector?
Yes. The SP240V400KA is designed for whole-house surge protection applications when properly installed on a compatible 120/240V split-phase electrical system.
How is the SP240V400KA different from the SP240V225KA?
The SP240V400KA has a higher surge current rating than the SP240V225KA, making it a stronger option for customers who want a higher-capacity whole-house surge protector with protection for normal surge events, indirect lightning effects, and electromagnetic disturbance surge events.
Does the SP240V400KA protect against lightning?
The SP240V400KA is designed to help protect against surge events caused by indirect lightning activity. No surge protector can guarantee protection from a direct lightning strike, but a properly installed surge protective device can help reduce the risk of damage from surge energy entering the electrical system.
Does the SP240V400KA provide EMP, CME, or solar flare protection?
Yes. The SP240V400KA is designed to help protect against damaging surge activity associated with electromagnetic disturbance events, including EMP, CME, and solar flare related electrical disturbances. Proper installation, grounding, and bonding are important for effective protection.
Should I choose the SP240V400KA or a smaller Bad Wolf model?
The SP240V400KA is a good choice for customers who want one of Bad Wolf’s highest-capacity whole-house surge protection options for a 120/240V split-phase system. Customers looking for a lower-cost option may consider the SP240V100KA, SP240V200KA, or SP240V225KA depending on the application and desired protection level.
What does the 400KA rating mean?
The 400KA rating refers to the surge current capacity of the device. It is designed to help protect connected electrical equipment from damaging surge events when properly installed on a compatible system.
Is this a Type 1 surge protective device?
Yes. The SP240V400KA is a Type 1 surge protective device, which allows it to be installed on the line side or load side of the service disconnect when installed in accordance with the product instructions and applicable electrical codes.
Does this surge protector need to be installed with a circuit breaker?
This surge protector is a Type 1 surge protective device and does not have to be installed in conjunction with a circuit breaker when installed as a Type 1 SPD in accordance with the product instructions and applicable electrical codes.
If this surge protector is installed as a Type 2 SPD on the load side of the service disconnect, Bad Wolf recommends using a 20 amp double-pole circuit breaker unless otherwise required by the authority having jurisdiction, local code, or the specific installation conditions.
What do the LED indicator lights mean?
The SP240V400KA includes green and red LED indicator lights. Green means the surge protector is functioning correctly. Red means the surge protector needs to be replaced.
Can this surge protector be installed outdoors?
Yes. The SP240V400KA uses a durable enclosure suitable for indoor or outdoor installation when installed according to the product instructions and applicable electrical codes.
Is the flush mount plate required?
No. The flush mount plate is optional. It provides a cleaner finished look when mounting the SP240V400KA on drywall or another flat surface.
Who should install this product?
This product should be installed by a qualified electrician, licensed contractor, or qualified installer familiar with electrical panels, service equipment, grounding, bonding, and surge protective devices.
Does this product include a warranty?
Bad Wolf surge protection devices include a 5-year product warranty. Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.